It is a very aerobatic model. It can fly fast or slow. I do not know all of the reasons why but it tolerates wind very well.
The Firebird is ready to fly for the price. The ultra stick is not.
You will need, but may already have
Brushless Motor
Brushless ESC
4+ Ch Radio
4 Sub-micro Servos
Servo Extensions & Y-harness
4 to 6-Ch Receiver
Li-Po Battery
Li-Po Charger
CA glue
Propeller